When configuring data sources for an Operations for Networks environment using the Bulk option, Aria Suite Lifecycle Manager provides a sample CSV file for defining the data sources. If the file is not properly defined, then the last entry in the list may be ignored.
LCM 8.18.0 PSPack 4 / patch 1
A blank line at the end of the file is not included, which thereby causes the last data source entry to be ignored after clicking "Submit".
Add a blank line to the end CSV file (each line requires a line-feed), then run the Bulk import process.
This may be addressed in a future release of LCM